MICHI A Thermal-IR Instrument Concept for the TMT

Transcription

1 MICHI A Thermal-IR Instrument Concept for the TMT Chris Packham University of Texas at San Antonio chris.packham@utsa.edu On behalf of the MICHI team Physics&Astronomy THE UNIVERSITY OF TEXAS AT SAN ANTONIO

2 Purpose of this Workshop 1. To invite science cases that would maximally leverage science output from a thermal-ir optimized (3-13µm) instrument from the TMT 1. These cases will then be flowed down to a set of science requirements, then instrument requirements 2. Please me and I will send you the template (chris.packham@utsa.edu), or take a template from the front, or my card 2. To engage with the USA community as in line with Mark s leadership of the NSF grant to plan for partnership of the TMT

3 The Take Home: What is bmichi? A high spectral/spatial thermal IR imager/ spectrometer 3-13µm wavelength of optimization Plate scales of 11.9 & 27.5mas at 3 and 8µm respectively Up to 60% Strehl at 3µm, 80% at 8µm Spectral resolutions of 600 & 120,000 Science focused on discs, prebiotics, investigating exoplanet imaging & Doppler imaging. Enables probes of the AGN torus & host galaxies

4 bmichi History MIRES (PI: Elias & Tokunaga) proposed as 1 st light instrument for the TMT in mid-2000 s Well received proposal, enabling transformative science in the MIR Dominantly high spectral resolution (R~120,000) at MIR (only) Leveraged from MIRAO Clearly established MIR on TMT as a firm goal within the planned instrumentation suite Ultimately not selected for 1 st set of inst. Reviews suggested that a blue arm of 3-5µm should be incorporated & broader science usages

5 bmichi History Reinvigoration of concept began on Japan s plan to join the TMT 1 st workshop held in NAOJ December 2009 lead by Okamoto-san Agreement made to investigate broadening the science cases and capabilities of MIRES to make it more suitable for the Japanese community And so MIRES evolved to MICHI Japanese lead by M. Honda, H. Kataza, Y. Okamoto, and I. Sakon USA lead by M. Chun, C. Packham, and M. Richter

6 TMT Parameter Space MICHI fits very well into the wavelength and spatial/ spectral resolution plot of the TMT MICHI & MIRAO were optimized for>7.5µm MIRAO will offer excellent IQ at 3 & 5 µm

7 Imaging Sensitivity >2 orders >2 orders Notes Point source sensitivity 10σ in one hour elapsed time E-ELT at MIR offers D 4 performance boost from primary Estimated from publications (simple scaling) or on-line calculators Observing/conditions assumptions can be widely different between groups

8 Block Diagram of Optics Details in Tokunaga et al Low risk, most components available off the shelf

9 MIRAO & Daytime Observing Daytime observing MIRAO/MICHI could exploit best seeing conditions in early morning hours Appears feasible with no loss in performance and affords an extra 1-2 hours per night (at minimal cost) of TMT observing time R&D efforts We appreciate the help of the Subaru AO team (especially Hayano-san) Testing using Subaru s AO system is on-going

10 Strehl Ratios FWHM of images/spectra do not tell the whole story Strehl ratio is also crucial of course, especially in regions where the source(s) is embedded in diffuse emission Typical MIR observations Telescope Size Strehl (8µm) Spitzer 85cm 95% Gemini 8.1m ~20-30% GTC 10.4m ~19% JWST 6.5m 80% TMT 30m 90%

11 NSF MSIP Reviews 2013 Intellectual merit is well presented and very compelling The thought that has gone into the scientific impact is impressive and complete If NSF participation in TMT is a realistic possibility, this proposal represents a positive step for the U.S. astronomical community. The science is compelling and well presented. The group has the right experience and expertise to make this effort successful. The science case for MIR with TMT is broad and compelling The science case for a mid-ir instrument on a 30m telescope is strong, and the preliminary design of this complex instrument is important and worthy of funding

12 Next Evolutionary Step At TMT forum in 2014, clear expression from community of desire for High spatial resolution (optical to MIR) High spectral resolution (optical to MIR) Several call-outs to MICHI Clear expressions of interest for L&M bands, but not currently covered by a TMT instrument Although there is strong support for MIR MICHI, we wish to serve as larger community as possible Hence the evaluation of extended coverage to 3-5µm so called bmichi

13 bmichi Science Team Currently engaging with bmichi science team to revise science cases USA (15, +~5?) Japan (30) India (skype with ~10 likely members in Jan) China (skype with a handful in Jan/Feb TBC) Canada still in progress Others (~5) We welcome your participation!

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15 bmichi Activities in 2016 Jan-Mar Updated and revised science cases from science team Mar-Apr Ranking of science cases within and across sub-areas Matrix of science cases Apr-May Flow-down of ranked science cases to ranked science requirements to instrument requirements May-Aug Revised feasibility-level optical design Collation of science cases to single coherent document Aug Documentation of science cases, flow-down, and feasibility-level optical design

16 bmichi Activities in 2016 Jan-Mar Updated and revised science cases from science team Mar-Apr Ranking of science cases within and across sub-areas Matrix of science cases Flow-down of ranked science cases to ranked science requirements to instrument requirements The Apr-May purpose of this workshop, and Skype meetings in January with interested persons who cannot be here, especially Revised in partner feasibility-level countries optical such design as India, Japan, May-Aug Collation of science China, cases etc. to single coherent document Aug Documentation of science cases, flow-down, and feasibility-level optical design

17 Science Case Template

18 Workshop Agenda